Clamp-coupling device for automatic paper-cutters.



No. 731,232. PATENTED JUNE 16, 1903.

I C. SEYBOLD.

CLAMP COUPLING DEVICE FOR AUTOMATIC PAPER GUTTERS. APPLICATION FILED 0012a. 1901.

N0 MODEL.

LEEE 277 z'fnesses fnvenfal mJ/. my

fliforney UNITED STATES CHARLES SEYBOLD,

Patented il'une 16, 1903.

OF DAYTON, OHIO.

CLAMP-COUPLING DEVICE FOR AUTOMATIC PAPER-CUTTERS.

SPECIFICATION forming part of Letters Patent No. 731,232, dated June 16, 1903. Application filed October 28,1901. Serial No. 80,296. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES SEYBOLD, a citizen of the United States, residing atDayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvementsin Clamp-OouplingDevices for Automatic Paper-Outters,of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, forming part of this specification.

My improvements relate to that class of antomatic paper-cutters in which the driving mechanisms for the clamp and for the knife have been connected by a friction-clutch to hold rigid the paper, but to allow the knife to continue its operation, the clamp stopping on the paper and the friction-clutch allowing the mechanism to slip.

For large paper-cutting machines with paper that is at all spongy almost crushingstrength in the clamp is needed to hold the paper, and in machines of this class it has been customary to connect the clamp with the knife cutting mechanism, so that the operation of the knife shall drive the clamp. The problem presented, therefore, with large machines was to shorten up the leverage between the clamp and knife-driving mechanism in order to obtain the maximum amount of clamppower; but the difficulty has been that in shortening the leverage between the clamppulling bars and the clamp-driving shaft there has not been suflicient stroke or movement of the knife-carrying mechanism to obtain the requisite movement of the clamp. In addition to this it has been customary to drive the clamp-shaft through the medium of the knife-carrying frame, and consequently the gearing or other mechanism employed in the machine for driving the knife has also had to sustain the operations of the clamp.

It is the purpose therefore of my invention to devise a construction in which the knifedriving mechanism shall be relievedfrom this strain of driving the clamp and in which ample stroke for the clamp can be obtained to furnish the requisite clamp movement notwithstanding a very short leverage between the clamp-pulling bars and the clamp-shaft.

In the drawings, Figure 1 is a side elevation of the paper-cutting machine with my improved means for driving the clamp. Fig. 2

is a rear elevation of one side of the papercutting machine, showing my improvements.

Fig. 3 is a detail front elevation of my friction-clutch.

In illustrating the novel features of my present invention I have only shown oneside of the machine, sufficient to make clear my present invention, which merely relates to the method of driving the clamp in machines of the class under consideration.

My improvements areillustrated and applied to that class of paper-cutting machines which is fully shown and described in my prior patent, No. 511,972, of January 2, 1894, and I have not consideredit necessary to illustrate or describe the detailsof such a papercutting machine other than to say that A is one of the end standards of the machine; B, the knife-carrier frame; O, the clamp, and D the table. Theknife-carrier and its knife are driven in anywell-known way, preferably by driving-shaft E and gearing, such as shown in my aforesaid patent. The clamp C is connected with its driving mechanism by pullins-bars F, one on each side.

G is the clamp-shaft, carrying the segmentgear H, which meshes with a rack L on the lower end of the pulling'bars, so that the rotation or oscillation of the clamp -driving shaft G will, through the medium of the segment gear and rack, actuate the pulling-bars F to raise and lower the clamp O, as required.

Mounted on the clamp-shaft G is a frictionclutch, such as is shown in my heretoforementioned patent, which, in brief, consists of the split ring a, keyed to the shaft Gand provided with a block I), mounted on one of the spokes of the band between the ends thereof.

This block b is rotated by the lever c, acted on by the screw (1, so that by adjusting the screw the split banda may be opened out. Mounted around this split band a is a ring 6, which has heretofore been coupled to the knife-carrier frame, sothat the movement of the knife-carrier frame would, through the medium of the split-band clutch, actuate the clamp-shaft and the clamp-pulling bars to raise and lower the clamp. As has already been stated, however, with this construction, the throw of the knife-carrier being limited, the leverage between the clamp-shaft and the clamp-pulling bars has had to be so geared in ICO order to obtain the necessary movement of the clamp that the requisite power needed in large machines with spongy paper could not be obtained for the clamp. I have therefore disconnected entirely the clamp-shaft from the knife driving mechanism. 'The ringband 6 in my improved machine is connected bya connecting-bar M with the crank-pin N on the gear-wheel O, which is mounted in a suitable bearing on the side of the frame. This gear 0 meshes with the pinion P, Whose shaft isjournaled in suitable bearings on the frame and carries at its inner end, just within the side standard A, the gear R, which in turn meshes with a pinion S, mounted on the driving-shaft E of the machine. The size and number of teeth in the several pinions and gear-wheels connecting the drivingshaft E of the machine with the connectingrod M of the friction-clutch are so arranged thata complete stroke for the clamp shall he obtained for each complete throw of the knife and so that the throw of the clamp shallv be slightly ahead of the knife movement, as itis of course essential that the clamp should reach and compress the paper before the knife begins its Work.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In a paper-cutting machine, the combination, with the main driving-shaft of the machine and a clamp-shaft with means for connecting same to the clamp, of a frictionclutch mounted on said clampshaft, and train of gears and pinions with connectingrod coupling said friction-clutch directly to said main driving shaft, substantially as shown and described.

2. In a paper-cutting machine, the combination, with the main driving-shaft of the machine, a clamp-shaft, and a clamp, with pulling-bars therefor and rack on the pullingbars with segment-gears on the clamp-shaft, of a friction-clutch, mounted on said clampshaft and train of gears and pinions with connecting-rod coupling said friction-clutch directly to said main driving-shaft, substantially as shown and described.

CHARLES SEYBOLD.

-Witnesses:

FRANK H. HERBST, H. W. MAKLEY. 

